1-559
5965-3002E
H
Features
• Dual Marked with Device
Part Number and DESC
Drawing Number
• Manufactured and Tested on
a MIL-PRF-38534 Certified
Line
• QML-38534, Class H and K
• Five Hermetically Sealed
Package Configurations
• Performance Guaranteed,
Over -55°C to +125°C
• High Speed: Typically
400 kBit/s
• 9 MHz Bandwidth
• Open Collector Output
• 2-18 Volt VCC Range
• 1500 Vdc Withstand Test
Voltage
• High Radiation Immunity
• 6N135, 6N136, HCPL-2530/
-2531, Function
Compatibility
• Reliability Data
Applications
• Military and Space
• High Reliability Systems
• Vehicle Command, Control,
Life Critical Systems
• Line Receivers
• Switching Power Supply
• Voltage Level Shifting
Hermetically Sealed, Transistor
Output Optocouplers for Analog
and Digital Applications
Technical Data
• Analog Signal Ground
Isolation (see Figures 7, 8,
and 13)
• Isolated Input Line Receiver
• Isolated Output Line Driver
• Logic Ground Isolation
• Harsh Industrial
Environments
• Isolation for Test
Equipment Systems
Description
These units are single, dual and
quad channel, hermetically sealed
optocouplers. The products are
capable of operation and storage
over the full military temperature
range and can be purchased as
either standard product or with
full MIL-PRF-38534 Class Level
H or K testing or from the
appropriate DESC Drawing. All
devices are manufactured and
tested on a MIL-PRF-38534
certified line and are included in
the DESC Qualified
Manufacturers List QML-38534
for Hybrid Microcircuits.
Each channel contains a GaAsP
light emitting diode which is
optically coupled to an integrated
photon detector. Separate
connections for the photodiodes
and output transistor collectors
improve the speed up to a
hundred times that of a conven-
tional phototransistor
optocoupler by reducing the
base-collector capacitance.
These devices are suitable for
wide bandwidth analog applica-
tions, as well as for interfacing
TTL to LSTTL or CMOS. Current
Transfer Ratio (CTR) is 9% mini-
mum at IF = 16 mA. The 18 V VCC
CAUTION: It is advised that normal static precautions be taken in handling and assembly of this component to
prevent damage and/or degradation which may be induced by ESD.
Truth Table
(Positive Logic)
Input Output
On (H) L
Off (L) H
Functional Diagram
Multiple Channel Devices
Available
V
CC
GND
V
O
V
B
*See matrix for available extensions.
4N55*
5962-87679
HCPL-553X
HCPL-653X
HCPL-655X
5962-90854
HCPL-550X
1-560
capability will enable the designer
to interface any TTL family to
CMOS. The availability of the
base lead allows optimized gain/
bandwidth adjustment in analog
applications. The shallow depth
of the IC photodiode provides
better radiation immunity than
conventional phototransistor
couplers.
These products are also available
with the transistor base node
connected to improve common
mode noise immunity and ESD
susceptibility. In addition, higher
CTR minimums are available by
special request.
Package styles for these parts are
8 and 16 pin DIP through hole
(case outlines P and E respec-
tively), 16 pin DIP flat pack (case
outline F), and leadless ceramic
chip carrier (case outline 2).
Devices may be purchased with a
variety of lead bend and plating
options, see Selection Guide
Table for details. Standard
Military Drawing (SMD) parts are
available for each package and
lead style.
Because the same functional die
(emitters and detectors) are used
for each channel of each device
listed in this data sheet, absolute
maximum ratings, recommended
operating conditions, electrical
specifications, and performance
characteristics shown in the
figures are identical for all parts.
Occasional exceptions exist due
to package variations and
limitations and are as noted.
Additionally, the same package
assembly processes and materials
are used in all devices. These
similarities give justification for
the use of data obtained from one
part to represent other part’s
performance for die related
reliability and certain limited
radiation test results.
Selection Guide–Package Styles and Lead Configuration Options
Package 16 Pin DIP 8 Pin DIP 8 Pin DIP 16 Pin Flat Pack 20 Pad LCCC
Lead Style Through Hole Through Hole Through Hole Unformed Leads Surface Mount
Channels 2 1 2 4 2
Common Channel Wiring None None VCC GND VCC GND None
HP Part # & Options
Commercial 4N55* HCPL-5500 HCPL-5530 HCPL-6550 HCPL-6530
MIL-PRF-38534, Class H 4N55/883B HCPL-5501 HCPL-5531 HCPL-6551 HCPL-6531
MIL-PRF-38534, Class K HCPL-257K HCPL-550K HCPL-553K HCPL-655K HCPL-653K
Standard Lead Finish Gold Plate Gold Plate Gold Plate Gold Plate Solder Pads
Solder Dipped Option #200 Option #200 Option #200
Butt Cut/Gold Plate Option #100 Option #100 Option #100
Gull Wing/Soldered Option #300 Option #300 Option #300
SMD Part #
Prescript for all below 5962- 5962- 5962- 5962- 5962-
Either Gold or Solder 8767901EX 9085401HPX 8767902PX 8767904FX 87679032X
Gold Plate 8767901EC 9085401HPC 8767902PC 8767904FC
Solder Dipped 8767901EA 9085401HPA 8767902PA 87679032A
Butt Cut/Gold Plate 8767901UC 9085401HYC 8767902YC
Butt Cut/Soldered 8767901UA 9085401HYA 8767902YA
Gull Wing/Soldered 8767901TA 9085401HXA 8767902XA
*JEDEC registered part.
8 Pin Ceramic DIP Single
Channel Schematic
ANODE
3
CATHODE 6
5
V
O
GND
I
O
I
F
2
+
–
V
F
8V
CC
7V
B
I
B
I
CC
Note base pin 7.
1-561
0.20 (0.008)
0.33 (0.013)
4.45 (0.175)
MAX.
20.06 (0.790)
20.83 (0.820)
0.51 (0.020)
MAX.
2.29 (0.090)
2.79 (0.110)
0.51 (0.020)
MIN.
0.89 (0.035)
1.65 (0.065)
8.13 (0.320)
MAX.
7.36 (0.290)
7.87 (0.310)
NOTE: DIMENSIONS IN MILLIMETERS (INCHES).
3.81 (0.150)
MIN.
Functional Diagrams
16 Pin DIP 8 Pin DIP 8 Pin DIP 16 Pin Flat Pack 20 Pad LCCC
Through Hole Through Hole Through Hole Unformed Leads Surface Mount
2 Channels 1 Channel 2 Channels 4 Channels 2 Channels
Note: 8 pin DIP and flat pack devices have common VCC and ground. 16 pin DIP and LCCC (leadless ceramic chip carrier) packages
have isolated channels with separate VCC and ground connections.
COMPLIANCE INDICATOR,*
DATE CODE, SUFFIX (IF NEEDED)
HP QYYWWZ
XXXXXX
* XXXX
XXXXXX
USA 50434 DESC SMD*
HP FSCN*
HP LOGO
COUNTRY OF MFR.
HP P/N
PIN ONE/
ESD IDENT DESC SMD*
*QUALIFIED PARTS ONLY
Leaded Device Marking
COMPLIANCE INDICATOR,*
DATE CODE, SUFFIX (IF NEEDED)
HP QYYWWZ
XXXXXX
XXXXXXX
XXX USA
* 50434 COUNTRY OF MFR.
HP FSCN*
HP LOGO
DESC SMD*
PIN ONE/
ESD IDENT
HP P/N
DESC SMD*
* QUALIFIED PARTS ONLY
Leadless Device Marking
5
7
6
8
12
10
11
9
GND
V
CC2
V
B2
1
3
2
4
16
14
15
13
V
OC1
GND
V
O1
V
O2
V
B1
1
3
2
4
8
6
7
5
V
CC
GND
V
OUT
V
B
1
3
2
4
8
6
7
5
V
CC
GND
V
O2
V
O1
5
7
6
8
12
10
11
9
GND
V
O4
V
O3
1
3
2
4
16
14
15
13
V
CC
V
O2
V
O1
Outline Drawings
16 Pin DIP Through Hole, 2 Channels
GND
1
V
B2
19
20
2
3
V
O1
87
V
CC2
V
CC1
10
GND
2
15
13
12
14
V
O2
V
B1
9
*QUALIFIED PARTS ONLY
1-562
Outline Drawings (contd.)
16 Pin Flat Pack, 4 Channels
8.13 (0.320)
MAX.
5.23
(0.206)
MAX.
2.29 (0.090)
MAX.
7.24 (0.285)
6.99 (0.275)
1.27 (0.050)
REF.
0.46 (0.018)
0.36 (0.014)
11.13 (0.438)
10.72 (0.422)
2.85 (0.112)
MAX.
0.89 (0.035)
0.69 (0.027)
0.31 (0.012)
0.23 (0.009)
0.88 (0.0345)
MIN.
9.02 (0.355)
8.76 (0.345)
NOTE: DIMENSIONS IN MILLIMETERS (INCHES).
20 Terminal LCCC Surface Mount, 2
Channels 8 Pin DIP Through Hole, 1 and 2
Channel
3.81 (0.150)
MIN.
4.32 (0.170)
MAX.
9.40 (0.370)
9.91 (0.390)
0.51 (0.020)
MAX.
2.29 (0.090)
2.79 (0.110)
0.51 (0.020)
MIN.
0.76 (0.030)
1.27 (0.050)
8.13 (0.320)
MAX.
7.36 (0.290)
7.87 (0.310)
0.20 (0.008)
0.33 (0.013)
7.16 (0.282)
7.57 (0.298)
NOTE: DIMENSIONS IN MILLIMETERS (INCHES).
8.70 (0.342)
9.10 (0.358)
4.95 (0.195)
5.21 (0.205)
1.78 (0.070)
2.03 (0.080) 1.02 (0.040) (3 PLCS)
4.95 (0.195)
5.21 (0.205)
8.70 (0.342)
9.10 (0.358)
1.78 (0.070)
2.03 (0.080)
0.51 (0.020)
0.64
(0.025)
(20 PLCS)
1.52 (0.060)
2.03 (0.080)
METALIZED
CASTILLATIONS (20 PLCS)
2.16 (0.085)
TERMINAL 1 IDENTIFIER
NOTE: DIMENSIONS IN MILLIMETERS (INCHES).
SOLDER THICKNESS 0.127 (0.005) MAX.
1.14 (0.045)
1.40 (0.055)
1-563
0.51 (0.020)
MIN.
5.57 (0.180)
MAX.
0.51 (0.020)
MAX.
2.29 (0.090)
2.79 (0.110)
1.40 (0.055)
1.65 (0.065) 9.65 (0.380)
9.91 (0.390)
5° MAX.
5.57 (0.180)
MAX.
NOTE: DIMENSIONS IN MILLIMETERS (INCHES).
0.20 (0.008)
0.33 (0.013)
Hermetic Optocoupler Options
Option Description
100 Surface mountable hermetic optocoupler with leads trimmed for butt joint assembly. This
option is available on commercial and hi-rel product in 8 and 16 pin DIP (see drawings below
for details).
200 Lead finish is solder dipped rather than gold plated. This option is available on commercial
and hi-rel product in 8 and 16 pin DIP. DESC drawing part numbers contain provisions for
lead finish. All leadless chip carrier devices are delivered with solder dipped terminals as a
standard feature.
300 Surface mountable hermetic optocoupler with leads cut and bent for gull wing assembly. This
option is available on commercial and hi-rel product in 8 and 16 pin DIP (see drawings below
for details). This option has solder dipped leads.
1.40 (0.055)
1.65 (0.065)
5.57 (0.180)
MAX.
0.51 (0.020)
MAX.
2.29 (0.090)
2.79 (0.110)
0.51 (0.020)
MIN.
1.14 (0.045)
1.40 (0.055)
4.32 (0.170)
MAX.
0.51 (0.020)
MAX.
2.29 (0.090)
2.79 (0.110)
0.51 (0.020)
MIN.
7.36 (0.290)
7.87 (0.310)
0.20 (0.008)
0.33 (0.013)
NOTE: DIMENSIONS IN MILLIMETERS (INCHES).
1.14 (0.045)
1.40 (0.055)
4.32 (0.170)
MAX.
0.51 (0.020)
MAX.
2.29 (0.090)
2.79 (0.110)
0.51 (0.020)
MIN.
1-564
Absolute Maximum Ratings
(No derating required up to +125°C)
Storage Temperature Range, TS...................................-65°C to +150°C
Operating Temperature, TA..........................................-55°C to +125°C
Case Temperature, TC................................................................+170°C
Junction Temperature, TJ...........................................................+175°C
Lead Solder Temperature ............................................... 260°C for 10 s
Peak Forward Input Current, (each channel,
≤1 ms duration), IFPK.............................................................. 40 mA
Average Input Forward Current, IFAVG
(each channel) ................ 20 mA
Reverse Input Voltage, BVR...................... See Electrical Characteristics
Average Output Current, IO (each channel) ................................... 8 mA
Peak Output Current, IO (each channel) ...................................... 16 mA
Supply Voltage, VCC ......................................................... -0.5 V to 20 V
Output Voltage, VO (each channel) ................................... -0.5 V to 20 V
Input Power Dissipation (each channel) ..................................... 36 mW
Output Power Dissipation (each channel) .................................. 50 mW
Package Power Dissipation, PD (each channel) ........................ 200 mW
Single Channel 8 Pin, Dual Channel 16 Pin,
and LCCC Only
Emitter Base Reverse Voltage, VEBO ............................................... 3.0 V
Base Current, IB (each channel) .................................................... 5 mA
ESD Classification
(MIL-STD-883, Method 3015)
4N55, 4N55/883B, HCPL-5500/01, and
HCPL-6530/31..................................................................... (∆), Class 1
HCPL-5530/31, HCPL-6550/51 ....................................... (Dot), Class 3
Recommended Operating Conditions
Parameter Symbol Min. Max. Units
Input Current, Low Level IFL 250 µA
Input Current, High Level IFH 12 20 mA
Supply Voltage, Output VCC 218V
1-565
Electrical Characteristics (TA = -55°C to +125°C, unless otherwise specified)
Group A[12]
Parameter Symbol Test Conditions Sub-groups Min. Typ.** Max. Units Fig. Note
Current Transfer CTR* VO = 0.4 V, IF = 16 mA, 1, 2, 3 9 20 % 2, 3 1, 2,
Ration VCC = 4.5 V 10
Logic High Out- IOH IF = 0, 1, 2, 3 5 100 µA41
put Current IF (other channels) = 20 mA,
VO = VCC = 18 V
Output Leakage IOLeak*I
F
= 250 µA, 1, 2, 3 30 250 µA41
Current IF (other channels) = 20 mA,
VO = VCC = 18 V
Input-Output II-O*V
I-O = 1500 Vdc, 1 1.0 µA 3, 9
Insulation Leak- RH = 45%
age Current TA = 25°C, t = 5 s
Input Forward VF*I
F
= 20 mA 1, 2, 3 1.55 1.8 V 1 1, 14
1.9 1, 13
Reverse Break- BVR*I
R
= 10 µA 1, 2, 3 5 V 1, 14
3 1, 13
Logic Single ICCH*V
CC = 18 V, IF = 0 mA 1, 2, 3 0.1 10 µA1
High Channel
Dual VCC = 18 V, IF = 0 mA 0.2 20 1, 4
Channel (all channels)
Quad VCC = 18 V, IF = 0 mA 0.4 40 1
Channel (all channels)
Logic Single ICCL*V
CC = 18 V, IF = 20 mA 1, 2, 3 35 200 µA51
Low Channel
Dual VCC = 18 V, 70 400 1, 4
Channel IF1 = IF2 = 20 mA
Quad VCC = 18 V, IF1 = IF2 = 140 800 1
Channel IF3 = IF4 = 20 mA
Propagation tPLH*R
L
= 8.2 kΩ, 9, 10, 11 1.0 6.0 µs 6, 9 1, 6
Delay Time to CL = 50 pF,
Logic High IF = 16 mA,
at Output VCC = 5 V
Propagation tPHL* 0.4 2.0
Delay Time to
Logic Low at
Output
*For JEDEC registered parts.
**All typical values are at VCC = 5 V, TA = 25°C.
Limits
Supply
Current
Supply
Current
down Voltage
Voltage
1-566
Typical Characteristics, TA = 25°C, VCC = 5 V
Parameter Symbol Typ. Units Test Conditions Fig. Note
Input Capacitance CIN 60 pF VF = 0 V, f = 1 MHz 1
Input Diode Temperature ∆VF-1.5 mV/°CI
F
= 20 mA 1
∆TA
Resistance (Input-Output) RI-O 1012 ΩVI-O 500 V 3
Capacitance (Input-Output) CI-O 1.0 pF f = 1 MHz 1, 11
Transistor DC Current Gain hFE 250 - VO = 5 V, IO = 3 mA 1
Small Signal Current ∆IO21 % VCC = 5 V, VO = 2 V 7 1
∆IF
Common Mode Transient |CMH| 1000 V/µsI
F
= 0 mA, RL = 8.2 kΩ, 10 1, 7
Immunity at Logic High VO (min) = 2.0 V
Level Output VCM = 10 VP-P
Common Mode Transient |CML| -1000 V/µsI
F
= 16 mA, RL = 8.2 kΩ, 10 1, 7
Immunity at Logic Low VO (max) = 0.8 V
Level Output VCM = 10 VP-P
Bandwidth BW 9 MHz 8 8
Multi-Channel Product Only
Input-Input Insulation II-I 1 pA Relative Humidity = 45% 5, 9
Leakage Current VI-I = 500 V, t = 5 s
Resistance (Input-Input) RI-I 1012 ΩVI-I = 500 V 5
Capacitance (Input-Input) CI-I 0.8 pF f = 1 MHz 5
Notes:
1. Each channel of a multi-channel device.
2. Current Transfer Ratio is defined as the ratio of output collector current, IO, to the forward LED input current, IF, times 100%.
CTR is known to degrade slightly over the unit’s lifetime as a function of input current, temperature, signal duty cycle, and system
on time. Refer to Application Note 1002 for more detail. ln short, it is recommended that designers allow at least 20-25%
guardband for CTR degradation.
3. All devices are considered two-terminal devices; measured between all input leads or terminals shorted together and all output
leads or terminals shorted together.
4. The 4N55, 4N55/883B, HCPL-6530 and HCPL-6531 dual channel parts function as two independent single channel units. Use the
single channel parameter limits. IF = 0 mA for channel under test and IF = 20 mA for other channels.
5. Measured between adjacent input pairs shorted together for each multichannel device.
6. tPHL propagation delay is measured from the 50% point on the leading edge of the input pulse to the 1.5 V point on the leading
edge of the output pulse. The tPLH propagation delay is measured from the 50% point on the trailing edge of the input pulse to the
1.5 V point on the trailing edge of the output pulse.
7. CML is the maximum rate of rise of the common mode voltage that can be sustained with the output voltage in the logic low state
(VO < 0.8 V). CMH is the maximum rate of fall of the common mode voltage that can be sustained with the output voltage in the
logic high state (VO > 2.0 V).
8. Bandwidth is the frequency at which the ac output voltage is 3 dB below the low frequency asymptote. For the HCPL-5530 the
typical bandwidth is 2 MHz.
9. This is a momentary withstand test, not an operating condition.
10. Higher CTR minimums are available to support special applications.
11. Measured between each input pair shorted together and all output connections for that channel shorted together.
12. Standard parts receive 100% testing at 25°C (Subgroups 1 and 9). SMD and 883B parts receive 100% testing at 25, 125, and
-55°C (Subgroups 1 and 9, 2 and 10, 3 and 11, respectively).
13. Not required for 4N55, 4N55/883B and 5962-8767901 types.
14. Required for 4N55, 4N55/883B and 5962-8767901 types only.
Coefficient
Transfer Ratio
1-567
Figure 1. Input Diode Forward
Current vs. Forward Voltage.
Figure 4. Logic High Output Current
vs. Temperature.
Figure 2. DC and Pulsed Transfer
Characteristic. Figure 3. Normalized Current
Transfer Ratio vs. Input Diode
Forward Current.
Figure 7. Normalized Small Signal
Current Transfer Ratio vs. Quiescent
Input Current.
Figure 5. Logic Low Supply Current
vs. Input Diode Forward Current. Figure 6. Propagation Delay vs.
Temperature.
I
OH
– LOGIC HIGH OUTPUT CURRENT – µA
-60 140
100
0.001
T
A
– TEMPERATURE – °C
-40 20 40 60
10
1
0.1
120
0.01
-20 80
0 100
I
F
= 250 µA,
I
F
(OTHER CHANNELS) = 20 mA
I
F
= 0 µA,
I
F
(OTHER CHANNELS) = 20 mA
I
F
= I
F
(OTHER CHANNELS)
= 0 mA
V
CC
= V
O
= 18 V
1-568
GND
V
CC
+12 V
V
O
(1 M
Ω
, 12 pF
TEST INPUT)
D.U.T.
R
F
V
IN
9.1 kΩ
SINGLE CHANNEL TESTING,
INDEPENDENT V
CC
DEVICES
1 kΩ
2.1 kΩ
+12 V
Q
1
47 µF 0.01 µF
Q
3
Q
2
0.01 µF
1.2 kΩ
15 kΩ470
Ω
100 Ω
V
B
V
O
51 Ω
22 Ω
100 Ω
0.1 µF0.1 µF
TRIM FOR UNITY GAIN
Q
1
, Q
2
, Q
3
: 2N3904 TYPICAL LINEARITY = +3 % AT V
IN
= 1 V
P-P
TYPICAL SNR = 50 dB
TYPICAL R
F
= 375 Ω
TYPICAL V
O dc
= 3.8 V
TYPICAL I
F
= 9 mA
1N4150
Figure 9. Switching Test Circuit.*
*JEDEC Registered Data.
GND
V
CC
I
F
+5 V
V
O
D.U.T.
100 Ω
I
F
MONITOR
PULSE GEN.
Z
O
= 50 Ω
t
r
= 5 ns
C
L
* = 50 pF
10 % DUTY CYCLE
1/f < 100 µs
R
L
NOTES:
* C
L
INCLUDES PROBE AND STRAY WIRING CAPACITANCE.
BASE LEAD NOT CONNECTED.
SINGLE CHANNEL
OR COMMON V
CC
DEVICES
GND
V
CC
+15 V
V
O
D.U.T.
100 Ω
AC INPUT
100 Ω
COMMON
V
CC
DEVICES
560 Ω
20 kΩ
+5 V
SET I
F
2N3053
1.6 Vdc
0.25 V
P-P
ac
0.1 µF
NORMALIZED RESPONSE – dB
0.1 100
+15
-20
f – FREQUENCY – MHz
+10
+5
-5
-15
1.0 10
-10
0
T
A
= 25 °C
INDEPENDENT
V
CC
DEVICES
COMMON V
CC
DEVICES
Figure 8. Frequency Response.
1-569
Figure 12. Operating Circuit for Burn-In and Steady State
Life Tests. All Channels Tested Simultaneously.
GND
V
CC
V
O
D.U.T.*
NOTE: BASE LEAD NOT CONNECTED.
T
A
= +125 °C
V
OC
NOMINAL CONDITIONS
PER CHANNEL: I
F
= 20 mA
V
CC
V
IN
+–
(EACH OUTPUT)
(EACH INPUT)
I
O
= 4 mA
I
CC
= 30 µA
0.1 µF
GND
V
CC
D.U.T. R
L
220 Ω
5 V V
CC
LOGIC GATE
0.01 µF
EACH CHANNEL
TTL
Logic Family LSTTL CMOS
Device No. 54LS14 CD40106BM
VCC 5 V 5 V 15 V
RL 5% Tolerance 18 kΩ* 8.2 kΩ22 kΩ
*The equivalent output load resistance is affected by the
LSTTL input current and is approximately 8.2 kΩ.
This is a worst case design which takes into account 25%
degradation of CTR. See App. Note 1002 to assess actual
degradation and lifetime.
VFF GND
VCC
IF
VCM
RL
+5 V
VO
+–
PULSE GEN.
NOTE: BASE LEAD NOT CONNECTED.
A
BD.U.T.
RM
SINGLE CHANNEL OR
COMMON VCC DEVICES
Figure 10. Test Circuit for Transient Immunity and Typical Waveforms.
Figure 11. Recommended Logic Interface.
1-570
Figure 13. Isolation Amplifier Application Circuit.
V
OUT
I
F
3
R
1
2
3
4
8
7
6
5
1
I
F2
V
IN
U
1
2
U
3
-15 V
–
+
–
+
I
C
2
-15 V
I
CC
6 mA
I
C
1
= K
1
I
F
1
I
n
1
I
C
2
= K
2
I
F
2
I
n
2
HCPL-5530
2
U
4
–
+
2
5 kΩ GAIN ADJUST
R
4
1 kΩ
5
R
5 kΩ
OFFSET ADJUST
I
C
1
220 Ω
R
2
2.7 kΩ
R
1
2.7 kΩ
+
U
2
–
+
–
U
1
, U
2
, U
3
, U
4
, LM307
50 kΩ
F
´
1
F
´
2
Description
The schematic uses a dual-
channel, high-speed optocoupler
(HCPL-5530) to function as a
servo type dc isolation amplifier.
This circuit operates on the
principle that two optocouplers
will track each other if their gain
changes by the same amount over
a specific operating region.
Performance of Circuit
• 1% linearity for 10 V peak-to-
peak dynamic range
• Gain drift: -0.03%/°C
• Offset Drift: ±1 mV/°C
• 25 kHz bandwidth (limited by
Op-Amps U1, U2)
MIL-PRF-38534 Class H,
Class K, and DESC SMD
Test Program
Hewlett-Packard’s Hi-Rel Opto-
couplers are in compliance with
MIL-PRF-38534 Classes H and K.
Class H devices are also in
compliance with DESC drawings
5962-87679, and 5962-90854.
Testing consists of 100% screen-
ing and quality conformance
inspection to MIL-PRF-38534.
